Stock Picker Is On-Line Star,
But His Trading Stirs a Storm

Go to any one of dozens of investing forums on the Yahoo! Web site and there's a good chance you'll cross the path of "Lion Master."

Amid the chatter on the electronic message boards, where investors -- usually cloaked in anonymity -- swap stock picks and investing ideas, the man who goes by "Lion_Master88" has developed a broad following. When he sounds in with stock picks, many people listen -- and act on his...